Tool-holder



(No Model.)

H. SOHONGKE.

TOOL HOLDER.

No. 415,926. Patented Nov. 26, 1889.

WITNESSES: @MMQP.

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UNFITED STATES PATENT OFFICE.

HENRY SOHONGKE, OF QOEANUS, NElY YORK.

TOOL-HOLDER.

SPECIFICATION forming part of Letters Patent No. 415,926, dated November26, 1889.

Application filed January 22, 1889. Serial No. 297,145. (No model.)

To 0055 whom it may concern.-

Be it known that I, HENRY SoHoNoKE, of Oceanus, in the county of Queensand State of New York, have invented a new and Improved Tool-Holder, ofwhich the followingis a full, clear, and exact description.

The object of the invention is to provide a new and improved tool-holderspecially designed for holding the tool in the proper position whilegrinding it on the grinding-wheel.

The invention consists of certain parts and details and combinations ofthe same, as will be fully described hereinafter, and then pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of the improvement. Fig. 2 is an endelevation of the same with parts broken out, and Fig. 3 is a plan viewof the same.

On the frame A, which supports the grinding-wheel B in the usual manner,are secured the standards 0 0, connected with each other at their upperends by a transverse bar D. A screw-rod E also connects the saidstandards 0 with each other, and is held in place by nuts or othersuitable means. 011 the screwrod E screw the sets of nuts F and F, andbetween the nuts F F is held one end of an arm G, fitted loosely on thescrew-rod E. F F serve to hold the arm G in any desired position on therod E by screwing the nuts up against the sides of the arm when thelatter is in its proper place. Between the nuts F is held a similar armG, and both arms G and G extend toward the grinding-wheel, and are eachprovided at the front end with slightlyinclined jaws G each having onits inside a longitudinally-extendin g V-shaped groove G plainly shownin Fig. 2.

The tool 11, to be ground on the grindingwheel B, is placed with itsblade in the grooves G of the jaws G held on the arms Gand G, as isplainly illustrated in the drawings. The handle end of the tool I'lextends rearward, while the sharp edge of the tool-blade passes onto theperiphery of the grinding-wheel B, as shown in the drawings.

On the front ends of the arms G G presses the end of a spring I, securedat its inner end The nuts between the j am-nuts J, screwing on thescrewrod E. The inner end of said spring I passes loosely around thescrew-rod E, and when the nuts J are moved it can be moved to eitherside, according to the position of the arms G and G. In order to presson both arms at the same time, I provide the spring I at its free endwith a transversely-extending branch I, of sufficient length to engageboth arms G and G. The top of the spring I is engaged by the lower endof a screw K, screwing in the transverse bar D and serving to increasethe tension of the spring I, so as to press the arms G and G downwardwith more or less force, thereby holding the tool H with more or lesspower against the grinding-wheel B.

A screw L passes loosely through the arm G, extends transversely, andscrews into the other arm G. This screw L serves to hold the ends of thearms G and G in place-that is, to draw the same toward each other afterthe tool-blade 1-1 is inserted in the groove G to lock the blade inplace on the jaws.

The device is" used as follows: In order to insert the blade of the toolH in the jaws G I unscrew the nuts F and F from the arms G and G, andthen turn the screw L so as to move the arms G and G nearer to eachother or farther from each other, according to the width of thetool-blade. hen the desired position is reached, the tool-blade isinserted in the grooves G in the jaws G after which the screw L isturned to move the jaws toward each other in order to lock the blade ofthe toolll in place 011 the jaws. The nuts F and F are then screwed upagainst the arms G and G, so that the latter are held in place on thescrew-rod E. The operator then adjusts the screw-rod K so as to increaseor decrease the tension of the spring I, which presses the arms G and Gdownward with more or less force, and consequently presses the edge tobe sharpened with more or less force against the periphery of thegrinding-wheel E.

It will be seen that the arms G and G can be moved transversely, so asto bring the toolblade over any desired part of the periphery of thegrinding-wheel B. It willfurther be seen that the tool is held veryaccurately in place on the periphery of the grinding-wheel, so that thecutting-edge is evenly ground.

Having thus fully described my invention,

I claim as new and desire to secure by Letters Patent 1. A tool-holdercomprising standards, forwardlyprojecting tool -holding arms, a T-shaped spring the transverse arms of which bear upon said arms, across-piece connecting the standards above the spring, and a setscrewprojecting through said cross-piece against the upper side of thespring, substantially as set forth. I

2. A tool-holder comprising standards connected with each other, ascrew-rod held on the said standards, sets of nuts on the saidscrew-rod, arms pivoted on the said screw-rod and adapted to be lockedin place by the said sets of nuts, jaws formed 011 the free ends of thesaid pivoted arms and provided with V- shaped grooves for receiving thetool-blade, a

HENRY SCI-IONOKE. Vitnesses:

THOMAS H. BOND, GEORGE BENNETT.

